Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-09-26
Phys.Rev.Lett. 93 (2004) 171101
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 1 figure, submitted to Phys. Rev. Lett. Correspondence to beacom@fnal.gov, mvagins@uci.edu
Scientific paper
10.1103/PhysRevLett.93.171101
We propose modifying large water \v{C}erenkov detectors by the addition of 0.2% gadolinium trichloride, which is highly soluble, newly inexpensive, and transparent in solution. Since Gd has an enormous cross section for radiative neutron capture, with $\sum E_\gamma = 8$ MeV, this would make neutrons visible for the first time in such detectors, allowing antineutrino tagging by the coincidence detection reaction $\bar{\nu}_e + p \to e^+ + n$ (similarly for $\bar{\nu}_\mu$). Taking Super-Kamiokande as a working example, dramatic consequences for reactor neutrino measurements, first observation of the diffuse supernova neutrino background, Galactic supernova detection, and other topics are discussed.
Beacom John F.
Vagins Mark R.
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